@inproceedings{Turk:1999:STU,
  author =	 {Greg Turk and James F. O'Brien},
  title =	 {Shape Transformation Using Variational Implicit Functions},
  year =	 1999,
  month =	 Aug,
  booktitle =	 {Proceedings of ACM SIGGRAPH 1999},
  location =     {Los Angeles, California},
  pages =	 {335--342},
}